Temperature regulator



Feb; 23 ,1926.

' E. D. sMYsR TEMPERATURE REGULATOR Filed Nov. 5, 192;`

Patented Feb. 23, 1926.

om an t asians ELI/IER D. SMYSER, OF FELLOWS, CALEORNIA.

TEMPERATURE REGULATOR.

Application tiled November be quickly and easily attached and set for operation at predetermined'temperatures on various forms of burner heated furnaces, ovens, boilers and the like.

Another object of the invention is to provide a novel temperature regulator for boilers which combines With it a steam pressure regulating means, both of which work cooperatively for the purpose ot maintaining an even predetermined steam pressure in the boiler and for preventingv boiler explosions, `both by controlling the burner valve.

lVith the above mentioned and other objects in view, the invention consists in the novel construction and combination of' parts hereinafter described, illust-rated in the acconipanying drawings, and set forth in the claims hereto appended.v it `being understood that various changes in the form, proportion, size and minor details of construction Within the scope of the claims may be re sorted to Without departing from the spirit or sacrificing any of the advantages ot the invention Referring to the drawings: K

The figure is a top plan view partly in section of the apparatus of the invention as when adapted for use in connection with a boiler.

Referring to the drawing there is shown a boiler 2d which is heated by a burner 25 having a valve 26 which is closed against the action of a spring 27. To the valve 26 is connected a rod 28 which is in turn connected With a bell crank29 mounted on an angular arm 3() which is vfixed as at 3l to one side ot the boiler, near one end thereof. To the bell crank 29 is connected one end of an operating rod 32 which rod is extended through a steam pressure regulating chamber 33, which chamber is supported 4by an 5, 1923.1 Serial No. 672,983.

arm 34E fixed to the outer side ot' the boiler near the, other. end thereof. Extending from the boiler is a pipe 35 which supplies Vsteam to the chamber 33 through a port 36 provided intermediate the ends of said chamber. A piston 37 is mounted Within the chamber 33 and lined to the rod 32. rThe outer end et the rod 32 which is extended beyond the chamber 33 has one end of a bell crank 38 pivoted thereto, said crank being pivoted intermediate of its ends as at 39 to av bracket l0 carried by the chamber; il adjustably mounted thereon and arranged so that t-he Weight Will Workagainst the pressure ot the steam in the chamber. On opposite sides ot the end Wall 42 of the chamber are stop members 43 and Ll-l which are tixed to the rod 32 and are adapted to engage With said Wall 42 on expansion and contraction of the boiler and consequent movement of the parts carried bythe boiler, The rod is made in two sections, the opposed ends of Which are threaded into a turn buckle 46 Which'has a hand Wheel` 47 embodied therein and serves as a` throttle for operating the valve. Y

Assuming that it is desirable to maintain an even steam pressure in the boiler, when the boil-er begins to functionthe operator may open and close the burner valve and vary the intensity of the heat by adjusting the Wheel 47 on the turn buckle 46, the mechanism then serving as a throttle control. /Vhen the desired pressure of steam is produced, for example 4:00 lbs., the operator adjusts the Weight 4l so that the leverage exerted through the bell crank 38 is suiiicient to hold the piston 37 in a definite position against the pressure of steam behind the piston in said chamber 33, the steam having entered the chamber through the pipe 35, the mechanism is then set for operation. It the steam pressure increases beyond the balance point, the force of the Weight is @ne leg of this bell crank has a Weight overcome and the piston 37 is moved so as to pull on the rod32, rock the bell crank 29 and pull on the rod 28 so as to close the valve, thereby shutting down the burner so that less heat is produced in accordance with the closing movement of the valve, and less steam is generated. This tends to maintain an even pressure. `When the steam pressure is increased, the heat of the boiler is increased and said boiler expands in the direction of its length7 causing` the arms 30 and 34 to movein opposite directions away fromr one another and producing movement of the rod 3i. 0n such movement of the arm 34, the chamber 33 is moved and the Wall 42 of the chamber engages the stop i4 thereby pulling on the rod 32. As the arm 3() moves in the opposite. direction to the movement ot the arm 34, the tendencyT is to move the bell crank bodily but since the rod 82 tends to rock the bell crank and move it in the opposite direction. said bell crank is rocked by movement oit' the arm 30 and tulcrums on its pivot connection withV the rod 32. Thus, both movements ot the arms cause the rods 32 and 28 to be pulled in the same direction and to close the valve.

Vvlhcn the steam pressure decreases the Weight 4l moves the piston 3T in the opposite direction so as to push on the rod 82 and this reverses the movement ot the parts causiup,` the valve to open, which opening,` movement is assisted by the action ot the spring 27 thereby providinggreater burner heat in the furnace and producing' more steam so as to vas quickly as possible increase and maintainthe desired steam pressure. The con` traction of the boiler assists iny thismove ment. and assures an accurate and reliable automatic operation` It the Water in the boiler reaches a dan,- gerously low level, the heat ot the boiler increases so as to cause considerable expansion as previously described. On this expansion of the boiler, the rods 32 and 28 are pulled and causethe burner valve to immediately close thereby shutting oft the generation of steam and preventing' explosion or other damage to the boiler. Ot course, on the increased steam pressure due to the low Water supply, the mechanism will act as previously described to cut ott the valve as Well as vthrough the expansion action ot' the boiler itself.

The rods and other elements ot the mechanism which constitute the means of connection between the brackets that are attached to the expansible and contractible elements and the valve are formed of material which does not appreciably expand and contract.

I claim:

l. A device of the character described in combination with burner heated apparatus including' a valve for controlling the burner and a container ton a Huid which is heated by the burner, which container is subjectto expansion and contraction, means ot connection between the container and valve providing tor closing and opening ot the valve on expansion and contraction ot' said container and means acting coincident to variation in the pressure ot the fluid in said container to operate said means of connection and open and close the valve.

2. Ina device of the character described the combination with burner heated apparatus including` a valve for controlling` the burner and a container tor fluid, which conm tainer is heated by the burner and is subject to evpansion and contraction, means ot connection between the burner valve and said container providing torV closing and open- *ing` ot said valve on contraction and eXpansion of said container and means associated with said means of connectiony and said container for actuating` the valve lthrough said means ot connection when the pressure in the container drops below orffexceeds a predetermined point.

3. In a device of the character described the combination with burner heated apparatus including` a valve for controllingl the burner and container 'for fluid, which container is heated by the burner and is subject to expansion and contraction, means ot connection between the burner valve and said container providing tor closing and opening' ot said valve on contraction and expansion ot said container and means associated With said means of connection and said container for actuating' the valve through said means ot connection when the pressure in the container drops beloivgor exceeds a predetermined point, which means of connection is adjustable to provide for its operation at diiieerent pressures.

ELMER D. SMYSlil-.li-A 

